Fruit Puree's are great to have for blended drinks. Be sure to check for expiration dates on the packaging. You can also use fresh fruits but some will not be sweet enough on their own and you may need to add a sweetener such as Sugar syrup.

Strawberry puree
Peach puree
Banana puree
Sugar syrup 
Orgeat syrup (Almond flavoring)
Grenadine
Passion Fruit syrup
Cream of Coconut (Pina Colada Mix)
Sweet and Sour (Margarita Mix)